as pope benedict prepares to step down, the vatican lashes out over media reports and speculation on why he's retiring. and about some of those who might replace him. >>> and, shaking it up. on how a song makes it to the top of the charts. some say it's about time. >>> good evening. we begin with a developing story from daytona beach, florida, where late this afternoon a race car smashed into the fence and sent debris flying into the grandstands. it happened on the eve of the daytona 500 on the final lap of a nationwide series race. at least a dozen people were injured. nbc's janet shamlian is in daytona with the latest. janet, good evening. >> reporter: lester good evening to you. yes, this was a jaw-dropping crash and it happened right